A shopper at a branch of South African retailer Pick n Pay in Johannesburg. Health insurer Discovery offers rebates on health food at the chain to its members who enroll in a health promotion program.
SIPHIWE SIBEKO/Reuters /Landov
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Noah Zandan shows off his Zeo sleep-tracking headband. His other self-tracking devices are on his wrists. Noah and his father, Peter, are both part of the growing "Quantified Self" movement.
Elise Hu/NPR
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Self-Tracking Apps To Help You 'Quantify' Yourself

A Coca-Cola mural in Vicksburg, Miss., where the soda was first bottled in 1894. Mississippi's governor is expected to sign a bill that would prevent the regulation of soda portion sizes by counties or towns.
pratt/via Flickr
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